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Tunable electrochromic filter for in situ Fourier spatial frequency filtering

  • Spatial optical Fourier filtering is a widespread technique for in situ image or light field processing. However, conventional fixed absorbing patterns or mechanical irises only allow an inflexible, very restricted control. Thus, we present two electrochromic spatial filters with ring-shaped or directional segments, which can be individually addressed and continuously tuned in transmission resulting in up to 512 different filtering states. For realization of the electrochromic devices, we overcome technical obstacles to realize seamless, gap-free electrochromic segments. We describe this novel fabrication process and demonstrate the successful application in an optical Fourier transform set-up.

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Metadaten
Author:Alexander Hein, Bastian Kaiser, Carsten Kortz, Egbert OesterschulzeORCiD
URN (permanent link):urn:nbn:de:hbz:386-kluedo-64401
ISSN:1094-4087
Parent Title (English):Optics Express
Publisher:OSA Publishing
Document Type:Article
Language of publication:English
Publication Date:2021/01/26
Year of Publication:2021
Publishing Institute:Technische Universität Kaiserslautern
Date of the Publication (Server):2021/06/29
Tag:Fourier filtering; electrochromic device; spatial optical filtering
GND-Keyword:Elektrochromes Material; Fourieroptik; Nanopartikel
Issue:29(5)
Number of page:8
Source:doi.org/10.1364/OE.418048
Faculties / Organisational entities:Fachbereich Physik
DDC-Cassification:5 Naturwissenschaften und Mathematik / 530 Physik
PACS-Classification (physics):70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
Collections:Open-Access-Publikationsfonds
Licence (German):Zweitveröffentlichung